Scientists have found a new way to make a Parkinson's drug – out of old plastic. The plastic is polyethylene terephthalate (or PET), widely used in plastic bottles and other packaging, and now deeply embedded in the environment . The drug is levodopa, often called the "gold standard" for managing the motor control problems that come along with Parkinson's. A team led by researchers from the University of Edinburgh in Scotland deployed specially engineered Escherichia coli bacteria to go from